class FileSystemNode:
    """" 模拟文件系统的节点 """
    def __init__(self, fully_qualified_name, striped_name, typ):
        self.fully_qualified_name = fully_qualified_name  # path of file or folder
        self.striped_name = striped_name 
        self.typ = typ # file or folder
        self.parent = None
        self.children = [] # 目录下的子目录
        self.ast_tree = None
    